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WO2013024983A2 - Procédé et appareil pour la transmission d'un signal de référence de sondage, et procédé et appareil pour indiquer la transmission d'un signal de référence de sondage s'y rapportant - Google Patents

Procédé et appareil pour la transmission d'un signal de référence de sondage, et procédé et appareil pour indiquer la transmission d'un signal de référence de sondage s'y rapportant Download PDF

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Publication number
WO2013024983A2
WO2013024983A2 PCT/KR2012/006073 KR2012006073W WO2013024983A2 WO 2013024983 A2 WO2013024983 A2 WO 2013024983A2 KR 2012006073 W KR2012006073 W KR 2012006073W WO 2013024983 A2 WO2013024983 A2 WO 2013024983A2
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Prior art keywords
srs
information
transmission
value
parameter set
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English (en)
Korean (ko)
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WO2013024983A3 (fr
Inventor
윤성준
김종남
박경민
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Pantech Co Ltd
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Pantech Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0026—Division using four or more dimensions, e.g. beam steering or quasi-co-location [QCL]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035—Resource allocation in a cooperative multipoint environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0204—Channel estimation of multiple channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals

Definitions

  • Embodiments of the present invention relate to a wireless communication system, and in particular, a method and apparatus for transmitting a sounding reference signal (hereinafter referred to as an 'SRS' or a 'sounding reference signal'), and a sounding reference signal therefor.
  • the present invention relates to a transmission indication method and apparatus.
  • the current mobile communication system is a high-speed, high-capacity communication system that can transmit and receive various data such as video and wireless data, away from voice-oriented services, and it is only required to develop a technology capable of transmitting large-capacity data corresponding to a wired communication network.
  • proper error detection method is essential to improve system performance by minimizing the reduction of information loss and increasing system transmission efficiency.
  • various reference signals are used in various communication systems in order to provide information on a communication environment to the counterpart device through uplink or downlink.
  • DM-RS demodulation reference signal
  • uplink channel for channel information related to demodulation. Sounding reference signals for estimation or measurement are defined.
  • the current SRS may be transmitted in specific corresponding subframe (s) periodically with a specific period and offset for each UE among cell-specific SRS transmittable subframes.
  • the cell-specific SRS transmittable subframes may be transmitted in specific subframe (s) set aperiodically.
  • An embodiment of the present invention is to provide a method for transmitting an SRS using the remaining orthogonal resources of the DM-RS, that is, non-precoded DM-RS resources.
  • Another embodiment of the present invention provides a method for transmitting an SRS in a resource region for transmitting a DM-RS of another UE.
  • Another embodiment of the present invention provides a method of defining a parameter set required for SRS transmission and signaling indication information for indicating a specific parameter set so that SRS can be transmitted in a resource region for transmitting a DM-RS of another UE. to provide.
  • some of the plurality of parameters required for SRS transmission are not included in the parameter set so that SRS can be transmitted in a resource region for transmitting a DM-RS of another UE, and for the DM-RS of the corresponding UE It provides a method of making an inherent decision using the indication information used.
  • an embodiment of the present invention provides a second node in a resource region including all or part of a DM-RS transmission resource region of a first UE by an eNodeB receiving uplink reference signals from a plurality of UEs.
  • a method for instructing SRS transmission of a UE wherein the eNodeB generates one or more parameter set information including some or all of a plurality of parameters used for SRS transmission of the second UE and transmits the generated one or more parameter set information to the second UE. And transmitting, to the second UE, downlink control information (hereinafter referred to as “DCI”) including indication information for determining one of the parameter sets for SRS transmission of the second UE.
  • DCI downlink control information
  • Another embodiment of the present invention is a method in which a second UE performs SRS transmission in a resource region including all or a portion of a DM-RS transmission resource region of a first UE, wherein the second UE is configured to transmit a second UE from the eNodeB.
  • an apparatus for receiving SRS transmission of a second UE in a resource region that receives uplink reference signals from a plurality of UEs and includes all or part of a DM-RS transmission resource region of the first UE A type 2 parameter set manager configured to generate one or more parameter set information including some or all of a plurality of parameters used for SRS transmission of the second UE and transmit the generated one or more parameter set information to the UE, and for SRS transmission of the second UE
  • SRS transmission comprising a type 2 SRS receiver for receiving the SRS of the second UE transmitted in the region, and a channel estimator for estimating the channel state of the second UE from the SRS of the second UE.
  • Another embodiment of the present invention is a UE apparatus for performing SRS transmission in a resource region including all or part of a DM-RS transmission resource region of one or more other UEs, wherein the resource region in which the one or more other UEs transmits DM-RS
  • a parameter set information receiver for receiving one or more parameter set information including some or all of a plurality of parameters required for transmitting the SRS in a resource region including all or part thereof, and indication information indicating a specific parameter set among the parameter sets;
  • An SRS transmission parameter determiner configured to determine the plurality of parameters by using an indication information receiver configured to receive a signal, a specific parameter set determined from the indication information, and some of the parameters used for DM-RS transmission of the UE;
  • the one after generating the SRS using the SRS transmission parameter Other UE is allocated to a resource region containing a resource region in whole or in part for transmitting the DM-RS on and provides an SRS transmission apparatus including a processing unit that transmits the SRS.
  • 1 illustrates an example of a transmission method of uplink DM-RS and SRS in a wireless mobile communication system.
  • FIG. 2 is a diagram for Type 2 SRS transmission according to the first embodiment (first scheme) of the present invention.
  • FIG. 3 illustrates Type 2 SRS transmission according to a second embodiment (second scheme) of the present invention.
  • FIG. 4 illustrates a flow of an SRS transmission signaling method according to an embodiment of the present invention, and describes a process performed by an eNodeB.
  • FIG. 5 is an internal configuration diagram of an eNodeB for performing SRS transmission signaling as shown in FIG. 4.
  • FIG. 6 illustrates a type 2 SRS transmission procedure according to the present invention, which is performed at a specific UE.
  • FIG. 7 illustrates an internal configuration of a type 2 SRS transmitting UE according to an embodiment of the present invention.
  • the wireless communication system provides various communication services such as voice and packet data.
  • the wireless communication system includes a user equipment (UE) and a base station (eNodeB; Evolved-Node-B).
  • UE user equipment
  • eNodeB Evolved-Node-B
  • the terminal, the base station or the eNodeB is applied to the same SRS transmission technology as the embodiment described below, which will be described in detail with reference to FIG.
  • the terminal in the present specification is a term that includes a mobile station (MS), a user terminal (UT), a subscriber station (SS), a wireless device, and the like.
  • a base station or an eNodeB or a cell is a station that communicates with a terminal, and includes a Node-B, a sector, a site, a base transceiver system (BTS), and an access point ( It may be called other terms such as an access point, a relay node, a remote radio head (hereinafter referred to as 'RRH').
  • BTS base transceiver system
  • 'RRH' remote radio head
  • a subject for transmitting and receiving a reference signal with a terminal is described as an eNodeB according to the present invention.
  • the present invention is not limited thereto, and all signal transmitting / receiving subjects having different representations or equivalent functions due to differences in communication schemes and the like. It should be interpreted to include all of them.
  • the eNodeB should be interpreted in a comprehensive sense to indicate some areas or functions covered by the Base Station Controller (BSC) in CDMA, the Radio Network Controller (RNC) in WCDMA, and the like. In addition, it may include coverage areas of various cells such as megacell, macrocell, microcell, picocell, femtocell, and relay node communication range.
  • BSC Base Station Controller
  • RNC Radio Network Controller
  • the terminal, the UE, the base station, or the eNodeB are two transmitting and receiving entities used in implementing the technology or the technical idea described in the present specification and are used in a comprehensive sense and are not limited by the terms or words specifically referred to.
  • the uplink transmission and the downlink transmission may use a time division duplex (TDD) scheme that is transmitted using different times, or may use a frequency division duplex (FDD) scheme that is transmitted using different frequencies.
  • TDD time division duplex
  • FDD frequency division duplex
  • An embodiment of the present invention describes a wireless communication system as an example, and evolves into asynchronous wireless communication evolving into Long Term Evolution (LTE) and LTE-advanced through GSM, WCDMA, HSPA, and CDMA, CDMA-2000 and UMB. It can be applied to resource allocation in the field of synchronous wireless communication.
  • LTE Long Term Evolution
  • LTE-advanced through GSM, WCDMA, HSPA, and CDMA, CDMA-2000 and UMB. It can be applied to resource allocation in the field of synchronous wireless communication.
  • the present invention should not be construed as being limited or limited to a specific wireless communication field, but should be construed as including all technical fields to which the spirit of the present invention can be applied.
  • a wireless communication system to which an embodiment of the present invention is applied may support uplink and / or downlink HARQ, and may use a channel quality indicator (CQI) for link adaptation.
  • CQI channel quality indicator
  • multiple access schemes for downlink and uplink transmission may be different from each other. For example, downlink uses Orthogonal Frequency Division Multiple Access (OFDMA), and uplink uses Single Carrier-Frequency Division Multiple Access (SC-FDMA). ) Is the same as can be used.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier-Frequency Division Multiple Access
  • the present invention should not be construed as being limited or limited to a specific wireless communication field, but should be construed as including all technical fields to which the spirit of the present invention can be applied.
  • one radio or radio frame includes 10 subframes and one subframe includes two slots. ) May be included.
  • the basic unit of data transmission is a subframe unit, and downlink or uplink scheduling is performed on a subframe basis.
  • each time slot may include seven or six symbols corresponding to 0.5 ms in the time domain.
  • the time-frequency domain defined by one subcarrier (or subcarrier) corresponding to one slot in the time domain and 180 kHz in the frequency domain may be referred to as a resource block (RB).
  • the transmission time of a frame is divided into TTIs (transmission time intervals) of 1.0 ms duration.
  • TTI transmission time intervals
  • sub-frame may be used in the same sense, and the frame is 10 ms long and includes 10 TTIs.
  • the TTI is a basic transmission unit, where one TTI includes two time slots of equal length, each time slot having a duration of 0.5 ms.
  • the time slot includes seven (or six) long blocks (LB) for a symbol.
  • LBs are separated into cyclic prefixes (hereinafter referred to as "CP").
  • CP cyclic prefixes
  • Each TTI or subframe is divided into 14 (or 12) symbols (axis) in the time domain.
  • Each symbol (axis) may carry one symbol.
  • the overall system bandwidth of 20 MHz is divided or divided into subcarriers of different frequencies.
  • the frequency may be divided or divided into the above-mentioned RB units.
  • the subcarriers included in one RB on the frequency may be 12 subcarriers corresponding to 180 kHz.
  • a bandwidth of 10 MHz may include 50 RBs in the frequency domain.
  • Each grid space constituted by each symbol and each subcarrier in the time-frequency domain may be referred to as a resource element (hereinafter, referred to as a RE), and one subframe in the time domain of the structure described above.
  • a resource element hereinafter, referred to as a RE
  • a demodulation reference signal (DM-RS) and a sounding reference signal () Is defined.
  • the terminal transmits a reference signal for uplink channel estimation or measurement, which is a type of reference signal, to the base station in order to transmit uplink channel information to the base station.
  • a reference signal for uplink channel estimation or measurement which is a type of reference signal
  • An example of the channel estimation reference signal may be a sounding reference signal (SRS) used in LTE and LTE-Advanced, which has the same function as a pilot channel for an uplink channel.
  • SRS sounding reference signal
  • This SRS is mainly used for channel quality estimation to enable frequency-selective scheduling of uplink.
  • the SRS is also not associated with transmission of uplink data and / or control information.
  • the current SRS may be transmitted in a specific corresponding subframe periodically with a specific period and offset for each UE among cell-specific SRS transmittable subframes. It may be defined as a periodic SRS or an SRS triggered by type 0.
  • cell-specific SRS transmittable subframes determined in periodic SRS transmission it may be transmitted in a specific subframe that is set aperiodic, which is triggered by an aperiodic SRS or type 1 It can be defined as SRS.
  • the SRS in order to increase the resource allocation of the SRS, is used by using an orthogonal resource of the uplink DM-RS, that is, a non-precoded DM-RS resource.
  • a method and apparatus for transmitting the same are disclosed.
  • a cyclic delay used for generating a sounding reference signal to an SRS, a demodulation reference signal to a DM-RS, a base station to an eNodeB, a terminal to a UE, a downlink control information to a DCI, and a reference signal sequence generation (Cyclic Shift) ) Is referred to as CS, an orthogonal sequence used for generating a reference signal sequence is referred to as OCC, and a resource block is referred to as RB.
  • 1 illustrates an example of a transmission method of uplink DM-RS and SRS in a wireless mobile communication system.
  • the SRS is transmitted in the last symbol of a specific subframe.
  • a specific subframe may be set periodically or aperiodically.
  • each UE periodically has a specific period and offset for each UE.
  • a specific subframe may be transmitted. As described above, this case may be referred to as a periodic SRS or an SRS triggered by a type 0.
  • the cell-specific SRS transmittable subframes determined in Table 1-1 or Table 1-2 may be transmitted in a specific subframe that is set aperiodically, and this case may be aperiodic SRS or type 1 It may be called SRS triggered by.
  • Table 1-1 and Table 1-2 show a cell-specific SRS transmittable subframe defined in FDD (Frame structure type 1) and TDD (Frame structure type 2), respectively.
  • offset The total number of possible cases is 16, which is transmitted by high layer signaling such as 4-bit RRC. For example, if srs-SubframeConfig is displayed as '7' in Table 1-1, the period is 5, the offset value is ⁇ 0, 1 ⁇ , and the first and second subs are configured based on five subframe units. SRS is transmitted in the frame.
  • each of a plurality of UEs periodically selects a specific subframe for SRS transmission.
  • the SRS may be periodically transmitted in a specific corresponding subframe with a specific period and offset for each UE among the determined cell-specific SRS transmittable subframes. (This may also be called periodic SRS transmission or SRS transmission triggered by type 0.)
  • the SRS for each UE is determined from Table 1-1 (FDD) or Table 1-2 (TDD), among the cell-specific SRS transmittable subframes.
  • FDD -1
  • TDD Table 1-2
  • a specific period and offset defined for each UE are periodically transmitted in a specific corresponding subframe.
  • a value for indicating SRS periodic transmission for each UE (SRS Configuration Index; I SRS ) may be transmitted to each UE through higher layer signaling such as RRC.
  • aperiodic SRS transmission or SRS triggered by Type 1 is as follows.
  • the SRS is UE-specific, as shown in Table 3-1 (FDD) and Table 3-2 (TDD), among cell-specific SRS transmittable subframes set in Table 1-1 (FDD) or Table 1-2 (TDD). It is transmitted in a specific subframe aperiodically with a specific period and offset defined.
  • the non-periodic transmission means that some configurable cases are specified in advance as shown in Table 4, and transmitted in dynamic signaling such as downlink control information (DCI) whenever necessary.
  • DCI downlink control information
  • various signaling information for SRS transmission for example, information on 'SRS transmission subframe', information on 'SRS transmission resource block (RB)', and CS value used when generating an SRS sequence
  • information about ',' number of SRS transmit antennas' and 'comb values' such as information about' SRS allocated subcarriers'
  • RRC higher layer signaling
  • some of the signaling information for SRS transmission are not directly lowered, but only a few cases are designated as one or more parameter sets in advance (the parameters in each parameter set are Each indicating information is transmitted to the UE by higher layer signaling (RRC, etc.) in advance). Only indicating values are dynamically signaled using DCI information.
  • aperiodic channel information feedback can be requested to the UE using DCI transmitted through a downlink physical downlink control channel (PDCCH), and the DCI format is 0/4.
  • PDCCH physical downlink control channel
  • one or two bits of information may be included in the DCI information and transmitted to the UE.
  • each information indicated by parameters in one or more parameter sets as shown in Table 4 is previously RRC.
  • the UE transmits the SRS aperiodically in the last symbol of a specific subframe using the indicated parameter set.
  • the information on the 'SRS transmission RB' is signaled by the total number of RBs used for cell-specificity and the number and location of RBs used for each UE among the cell-specifically used RBs.
  • the total RBs are specific RBs corresponding to the signaled number among the RBs corresponding to the total system bandwidth (BW). For example, if the system BW is 50RB and the number of signaled RBs is 48, then 48 of the 50 RBs are used.
  • the number of cell-specific total RBs used is transmitted with a parameter value of C SRS , and the number of RBs used for each UE is defined as a parameter of B SRS .
  • the C SRS is 1 and the B SRS is 2
  • the total number of cell-specific RBs used for total SRS transmission is 48, of which 8 are RBs used for a specific UE.
  • n RRC may be defined to represent the positions of RBs used for each UE.
  • the number of cell-specific RBs used, the number of RBs used for each UE, and their positions are transmitted through higher layer signaling (RRC, etc.).
  • RRC higher layer signaling
  • Type 1 the number of RBs used for each UE and the location thereof are included in the parameter set, and information on each value indicated by the above parameters (B SRS , n RRC, etc. mentioned above) in each parameter set. Is predefined by higher layer signaling (RRC, etc.).
  • the comb value which is information on the 'SRS allocated subcarrier', is 0 or 1, which means that the subcarrier through which the SRS sequence is substantially mapped and transmitted for the above-mentioned 'SRS transmission subframe' and 'SRS transmission RB'. Indicates whether is an even subcarrier or an odd subcarrier. This is also transmitted by higher layer signaling (RRC, etc.) for each UE. In the case of type 1, the information is included in the parameter set, and the information on the value substantially indicated by the parameter in each parameter set is predefined by higher layer signaling (RRC, etc.).
  • the SRS sequence is a base sequence based on the Zadoff-Chu sequence as shown in Equation 1.
  • Is a length based on the RB used for SRS transmission Number of RBs used x number of subcarriers in the RB (usually 12) / 2).
  • the base sequence may be generated differently for each cell and for each subframe (that is, u and v values of the base sequence may vary according to a cell ID and a slot number within the subframe) and a CS value May be generated differently for each UE and antenna port.
  • Equation 1 Is used to calculate the CS value For each UE, a total of eight values from 0 to 7 are transmitted through higher layer signaling (RRC, etc.). The information is included in the parameter set, and the information on the value substantially indicated by the parameter in each parameter set is predefined by higher layer signaling (RRC, etc.)), and the CS value for each antenna port is As seen above sent It is determined by a specific rule with a value.
  • RRC higher layer signaling
  • the SRS has been described above, and the DM-RS will be described below.
  • the DM-RS is a reference signal transmitted by a user equipment to a base station and is associated with a physical uplink shared channel (PUSCH) transmission or an uplink control channel (PUCCH) transmission. It is transmitted for channel estimation for channel modulation.
  • PUSCH physical uplink shared channel
  • PUCCH uplink control channel
  • the DM-RS is transmitted in every slot in every subframe in which the PUSCH or the PUCCH is transmitted, as described above, it is not necessary to separately indicate information on the 'DM-RS transmission subframe' like the SRS.
  • the information on the 'DM-RS transmission RB' is also associated with the PUSCH transmission or the PUCCH transmission, it is based on the previously transmitted signaling information.
  • a DM-RS associated with a PUSCH hereinafter, referred to as a PUSCH DM-RS
  • the DM-RS is transmitted to RBs to which a PUSCH is allocated, and thus is based on this.
  • the RBs to which the PUSCHs are allocated for each UE depend on the field value for the RB assignment in the above-described DCI.
  • the DM-RS sequence is mapped and transmitted for all subcarriers in the RB used for DM-RS transmission, information such as a comb value, which is information on the 'SRS allocated subcarrier' in the SRS, is not necessary. .
  • the DM-RS sequence is the same as the SRS sequence, as shown in Equation 2, based on a Zadoff-Chu sequence.
  • Is the length corresponding to the RB used for DM-RS transmission. Number of RBs used x number of subcarriers in the RB (usually 12).
  • the base sequence may be generated differently for each cell and for each slot (that is, u and v values of the base sequence may vary according to a cell ID and a slot number in a subframe) and a CS value May be generated differently for each UE and layer.
  • DM-RS is used to calculate the CS value
  • Equation 2 a total of three parameter values are obtained by performing a modular 12 operation.
  • the value is transmitted differently for each UE, which is transmitted through a 3-bit value (Cyclic Shift Field in uplink-related DCI format) included in the DCI.
  • orthogonal sequence (OCC, etc.) used when generating a DM-RS sequence
  • the value of is also indicated according to the 3-bit value transmitted dynamically through the DCI.
  • Wow 3-bit value used to indicate Wow Examples of values of are given in Table 6.
  • An embodiment of the present invention provides a method and apparatus for transmitting an SRS using the remaining orthogonal resources of the DM-RS, that is, non-precoded DM-RS, in order to increase the allocated resources of the SRS.
  • FIG. 2 is a diagram for Type 2 SRS transmission according to the first embodiment (first scheme) of the present invention.
  • the PUSCH DM-RS is transmitted in the center symbol (fourth symbol) of every slot of the subframe to which the PUSCH is allocated in the case of a normal CP, and the PUSCH is allocated in the case of an extended CP. Transmitted in the third symbol of every slot of a subframe.
  • the sequence and the basic sequence for the DM-RS are the same and may have orthogonality if the CS values are different.
  • the sequence having the orthogonality may be transmitted in a resource in which a DM-RS is transmitted for SRS transmission of a second UE other than the first UE.
  • a DM-RS sequence for DM-RS allocated in association with a PUSCH region allocated for UE1 has a CS value (specifically, for two layers). ) If it is generated with 0 and 6, it is not using all the distinguishable CS values when generating the DM-RS sequence, so that other UEs are transmitted to the resource region where the DM-RS for UE1 is transmitted and SRS for UE3 in FIG. 2. It may be.
  • the eNodeB that receives the uplink reference signals from the plurality of UEs instructs SRS transmission of the second UE in a resource region including all or part of a DM-RS transmission resource region of the first UE.
  • One or more parameter set information (and each information indicated by the plurality of parameters in the respective parameter set) may be generated by configuring some or all of the plurality of parameters used for SRS transmission of the second UE. Transmitting to the second UE, including the DCI, the indication information for determining one of the parameter sets for SRS transmission of the second UE, to the second UE, and the receiving second UE receives the determined plurality of parameters.
  • the SRS in the resource region including all or part of the DM-RS transmission resource region of the first UE is allocated to transmit to the eNodeB.
  • some of the plurality of parameters used for SRS transmission of the second UE are not included in the parameter set, and are to be determined implicitly from information included in DCI for DM-RS of the second UE.
  • the parameter determined by the information included in the DCI for the DM-RS and not included in the parameter set may be one of the CS (cyclic shift) value and the OCC (orthogonal sequence) value used to generate the SRS sequence according to an embodiment. There can be more than one.
  • the SRS sequence for the SRS transmission of the UE3 is made equal to the DM-RS sequence of the UE1 and generated when the DM-RS sequence is generated.
  • the CS value used for example, The other CS values (for example, 3 and 9) are used except for the values 0 and 6.
  • 'Type 2 SRS transmission' or 'Type' SRS transmission triggered by '2' is referred to for convenience, but is not limited to the above term. (For example, you could still call it Type 1, or you could call it 'transfer SRS using non-precoded DM-RS').
  • the following signaling information should be transmitted to the UE.
  • Information on the 'SRS transmission subframe' transmitted in the type 2 method That is, the information about the cell-specific SRS transmission subframe (the entire SRS transmission subframe) may be the same as the existing type 0 and the type 1,
  • the above-mentioned 'SRS transmission subframe' information is information on a subframe used for type 2 SRS transmission for each UE.
  • Information on the 'SRS transmission RB' transmitted in the type 2 method information on the cell-specific SRS transmission RB (that is, the entire SRS transmission RB) may be the same as the existing type 0 and the type 1, as mentioned above.
  • One 'SRS transmission RB' information is information on the RB used for the type 2 SRS transmission for each UE.
  • CS value and / or orthogonal sequence (OCC) used when generating an SRS sequence' transmitted in a type 2 scheme are information that can be transmitted differently for each UE.
  • the SRS allocation slot information is information that can be transmitted differently for each UE.
  • the 'number of SRS transmit antenna ports' information is information that can be transmitted differently for each UE.
  • the above-mentioned signaling information can be all instructed to the UE by higher layer signaling (RRC, etc.) like Type 0, or some information can be instructed to UE in advance by higher layer signaling (RRC, etc.) like Type 1 and the values can be indicated.
  • RRC higher layer signaling
  • Some of these may be designated as parameter sets as shown in Table 4, and may be dynamically indicated through DCI whenever SRS transmission is required.
  • DM-RS information transmitted dynamically in every subframe through DCI among signaling information (for example, information on 'DM-RS transmission RB', 'CS value used when generating a DM-RS sequence and OCC 'information, etc.) in the same manner as the type 0 or 1, when information necessary for SRS transmission of another UE is signaled to the same resource using non-precoding DM-RS. It can cause restriction.
  • a transmission is required by specifying a parameter set as a table 4
  • some of the values indicated to the UE by higher layer signaling (RRC, etc.) or previously indicated to the UE through higher layer signaling (RRC, etc.) and indicated by the information can be indicated.
  • the CS value used for generating the resource region and the SRS sequence to which the SRS is transmitted cannot be changed substantially and is semi-static in accordance with a relatively long period of RRC signaling. Will be set to).
  • the DM-RS allocation resource region of the existing UE1 is previously set to the SRS resource region of UE3. Constraints must be allocated with the same bandwidth and resource allocation start point, and CS values used for generating existing DM-RS sequences must also be assigned different CS values than those used for generating a preset SRS sequence. This follows.
  • the remaining orthogonal resources of the existing DM-RS are used to increase the allocated resources of the SRS.
  • PHICH collisions with the resource region to which the existing DM-RS is allocated (specifically, the resource region to which the PUSCH is associated) are allocated
  • the CS value used to generate the DM-RS sequence which has a significant influence on the collision), is different from the SRS that is multiplexed and transmitted in the same resource region, unlike the conventionally scheduled dynamic according to the system situation. In consideration of this, scheduling may not be performed dynamically, causing scheduling limitations.
  • some of the above-mentioned signaling information for SRS transmission of Type 2 may be set and indicated dynamically through DCI.
  • the scheduling restriction caused by the aforementioned DM-RS transmission can be solved.
  • an overhead problem may occur due to an increase in the amount of information bits included in the DCI. .
  • the present invention proposes a method and apparatus for solving the scheduling restriction caused in the existing DM-RS transmission without causing a problem.
  • Various signaling information is transmitted from the eNodeB to the UE for type 2 SRS transmission.
  • SRS request field a specific field value
  • the information on each value indicated by the parameters included in each parameter set is transmitted to the UE in advance by higher layer signaling (RRC, etc.) and the like.
  • the parameter set may be expressed as shown in Table 7.
  • Table 7 below may be used instead of Table 4, and needs 1 bit to indicate whether the parameter set for type 1 or the parameter set for type 2 to distinguish it from the existing table 4.
  • the 1 bit may be indicated by higher layer signaling (RRC, etc.) or may be indicated by being included in DCI. That is, the information bits added to the DCI in comparison with the conventional are 0 bits or 1 bit.
  • RRC higher layer signaling
  • 1 bit may be additionally included in the DCI, and when this 1 bit is indicated by higher layer signaling (RRC, etc.), no bit is added to the DCI.
  • a parameter set for Type 2 may be defined as shown in Table 8.
  • the information bits added in comparison with the existing and included in the DCI are 1 bit or 2 bits.
  • the table for the parameter set included in the DCI is Table 4 for Type 1 and Table 8 for the newly defined Type 2, and 1 to 2 bits corresponding to Table 8 are additionally included in the DCI.
  • Table 4 a case for type 2 may be added to separately define a parameter set as shown in Table 9.
  • the information bits added in comparison with the existing and included in the DCI are 1 bit. That is, the table for the parameter set included in the DCI is only Table 9 with Table 4 extended (the existing Table 4 does not exist), and Table 9 corresponds to the case where additional information corresponding to 1 bit is increased in comparison with the existing Table 4 .
  • parameter sets for type 2 can be defined through Tables 7 to 10. If there is a PDCCH for uplink of a corresponding UE such as an uplink grant, SRS transmission for the type 2 method If the PDCCH for the UE does not exist at all, or if there is only a PDCCH for downlink (downlink) of the UE, such as downlink assignment, even if the type 2 SRS transmission This parameter set may be used for Type 1 even if it is indicated as a parameter set for.
  • the first scheme when a specific value designated as a parameter set value is transmitted through a higher layer signaling (RRC, etc.) as a type 1 and transmitted through a specific field (SRS request filed) in DCI, the first scheme is included in the parameter set.
  • RRC higher layer signaling
  • SRS request filed a specific field
  • 'Type 2 SRS transmission RB for each UE' 'Type 2 SRS allocation slots for each UE', 'Type 2 SRS transmission antenna port number for each UE', 'CS value for generating the SRS sequence for each UE of type 2 And / or OCC value 'and the like.
  • Information on 'type 2 SRS transmission RB for each UE' is a parameter corresponding to the number of RBs used for each UE (for example, the aforementioned B SRS ) and RBs used for each UE. It may include a parameter for representing the position (for example, n RRC mentioned above), and a resource block for representing the existing DM-RS transmission RB (specifically RB for PUSCH transmission associated with DM-RS transmission) It may be indicated according to a resource block assignment method (for example, one of a type 0 assignment, a type 1 assignment, and a type 2 assignment, which is a resource allocation method defined in a resource block allocation field in DCI).
  • a resource block assignment method for example, one of a type 0 assignment, a type 1 assignment, and a type 2 assignment, which is a resource allocation method defined in a resource block allocation field in DCI.
  • 'Type 2 SRS transmit antenna port number per UE' is information for indicating how many antenna ports are used for SRS transmission of a specific UE.
  • Table 11 below is an example of the type of each parameter constituting the parameter set configurable by the first scheme and the length of the information bit used to indicate the same.
  • signaling information for type 2 SRS transmission included in the parameter set of Table 11 may not be included in the parameter set and may be signaled in another manner.
  • the information on the 'CS value and / or OCC used in generating the SRS sequence' transmitted in the type 2 method is not included in the parameter set and may be implicitly indicated as described below. .
  • some of the signaling information for type 2 SRS transmission may be included in the parameter set as shown in Table 11, but it may be determined using DCI information for DM-RS of the type 2 SRS transmitting UE.
  • some of signaling information for SRS transmission of UE3 (that is, S3 transmission of UE3 by type 2) multiplexed to a resource region where DM-RS of legacy UE1 is transmitted are transmitted. This is implicitly indicated by using information transmitted in a DCI indicated for UE3 transmitting the SRS.
  • the 3-bit information value indicated for each UE is a CS value and an orthogonal sequence for each layer used for DM-RS transmission.
  • the 3-bit information value is a type 2 of the same UE. It may be information indicating a CS value and / or an orthogonal sequence for each antenna port used for SRS transmission of the SRS.
  • the UE3 considers only the UE3 when transmitting the DM-RS or only considers another UE transmitting the DM-RS as MU-MIMO by sharing the same resource region as the UE3 with the UE. If the 3 bit information as shown in Table 6 is transmitted through DCI by setting the CS value and / or OCC used when generating the sequence, in the above scheme, the UE3 additionally multiplexes the resource region where the DM-RS of a specific UE1 is transmitted.
  • Only when transmitting an SRS (for example, when a parameter set value for SRS transmission by Type 2 of UE3 does not indicate a case where there is no SRS transmission) and is used when generating a DM-RS sequence in consideration of a specific UE1 3 bit information as shown in Table 6 may be transmitted through DCI by setting the CS value and / or the OCC value.
  • CS value and / or an OCC value only the CS value may be included or implicitly determined in the parameter set with 3 bits in length, and the CS value and the OCC value may be included or implicitly determined in the parameter set with 3 bits in length. It means that there is.
  • the 3-bit information on the 'CS value and / or OCC value for generating the SRS sequence for each UE of type 2' is included in the parameter set, or through the information included in the DCI for the DM-RS of the corresponding UE.
  • one scheme may be determined inherently in the system, but one of two signaling methods may be used depending on the system situation.
  • a signaling method implicitly indicated through the DCI information of the corresponding UE may be used, but the PDCCH for the corresponding UE does not exist at all or is downlinked. If DCI information of the corresponding UE is not available, such as only when there is a PDCCH for downlink of the corresponding UE such as link allocation, a scheme of including the type 2 parameter set for SRS transmission may be used as shown in Table 11 below. will be.
  • information that is not included in the parameter set shown in Table 11 includes 'type 2 SRS transmission subframe for each UE'.
  • the 'type 2 UE-specific SRS transmission subframe' information may be directly transmitted through higher layer signaling (RRC, etc.) similarly to the case of type 0 or 1, but may be determined inherently.
  • RRC higher layer signaling
  • DCI including information for DM-RS for a UE transmitting SRS in Type 2 (UE3 of FIG. 2) is delivered.
  • information not included in the parameter set shown in Table 11 is 'cell-specific full SRS transmission subframe' information, 'cell-specific full SRS transmission RB' information, and the like. However, this may be determined in the same manner as the conventional type 0 or type 1.
  • One or more of 'CS value and / or OCC value for UE-specific SRS sequence generation' may be determined as a parameter set indicated by information included in DCI for SRS transmission of the second UE.
  • 'CS value and / or OCC value for generating a SRS sequence for each UE' may be included in the parameter set, unlike 3 transmitted through DCI for DM-RS transmission of the second UE. It can be determined using the bit signaling information.
  • a second method will be described among parameter signaling methods for SRS transmission of type 2 according to an embodiment of the present invention.
  • FIG. 3 illustrates Type 2 SRS transmission according to a second embodiment (second scheme) of the present invention.
  • the information included may include 'SRS transmission RB per UE of type 2', 'Number of SRS transmission antenna ports per UE of type 2', 'CS value and OCC value for generating SRS sequence for each UE of type 2', and the like. have.
  • the first scheme includes 'type 2 SRS allocation slots for each UE' information, but the second scheme does not exist.
  • 'CS value for generating a type 2 UE-specific SRS sequence' is used. It could be included only, but in the second method, 'OCC value' is basically included in addition to 'CS value for generating SRS sequence for each UE of type 2'.
  • Information on 'type 2 SRS transmission RB for each UE' is a parameter corresponding to the number of RBs used for each UE (for example, the aforementioned B SRS ) and RBs used for each UE. It may include a parameter for representing the position (for example, n RRC mentioned above), and a resource block for representing the existing DM-RS transmission RB (specifically RB for PUSCH transmission associated with DM-RS transmission) It may be indicated according to an allocation method (eg, one of a type 0 allocation, a type 1 allocation, and a type 2 allocation, which is a resource allocation scheme defined in a resource block allocation field in the DCI).
  • an allocation method eg, one of a type 0 allocation, a type 1 allocation, and a type 2 allocation, which is a resource allocation scheme defined in a resource block allocation field in the DCI.
  • the information on the number of SRS transmit antenna ports for each UE of type 2 is information for indicating how many antenna ports are used for SRS transmission of a specific UE.
  • Table 12 below shows an example of a parameter set for SRS transmission of type 2 according to the second scheme.
  • the parameter set for SRS transmission of Type 2 according to the second scheme may include a value of 3 bits for indicating CS and OCC at the same time, or 3 to indicate CS and OCC separately.
  • the 4-bit CS value parameter and the 1-bit OCC value parameter may be included.
  • some of the parameters for SRS transmission of Type 2 included in the parameter set of Table 12 may be signaled or implicitly determined in other manners than the manner included in the parameter set.
  • one or more of the CS value and the OCC value among the information of 'CS value and OCC value for generating UE-specific SRS sequence of type 2' are not included in the parameter set as shown in Table 12, It may also be indicated.
  • signaling values for both the CS and the OCC used when generating the existing DM-RS sequence shown in Table 6 may be used as they are. That is, the values of 3 bits defined by changing the portion of the layer to the antenna port in the values shown in Table 6 may be used as they are when generating the SRS sequence by Type 2.
  • the equation used to generate the sequence may also be an equation defined by changing the portion of the layer to the antenna port in Equation 2.
  • the method of transmitting both CS and OCC through 3-bit signaling may be included in a parameter set and transmitted as mentioned in Table 12 above, or may be implicitly indicated as described below.
  • an SRS sequence of type 2 may be generated in a different manner from the conventional method.
  • Equation 3 generation of an SRS sequence of type 2 based on the existing DM-RS sequence generation method may be defined as in Equation 3.
  • the CS value may be independently transmitted through 3-bit or 4-bit signaling as shown in Table 13 or Table 14, which may be transmitted by being included in a parameter set as shown in Table 12.
  • the OCC is transmitted through 1-bit signaling independently of the CS value, and the OCC value has the same value for all antenna ports.
  • the 1-bit value for this OCC may be included in the parameter set and transmitted as mentioned in Table 12, or may be implicitly indicated as mentioned below.
  • SRS sequence generation for type 2 SRS transmission based on existing SRS sequence generation methods may be defined as shown in Equation 4.
  • the CS value may be independently transmitted through 3 bit signaling as in the case of the existing type 0 or type 1 SRS, which may be transmitted in a parameter set as shown in the lower table of Table 12.
  • the OCC is transmitted through 1-bit signaling independently of the CS value, and the OCC value has the same value for all antenna ports.
  • the 1-bit value for this OCC may be included in the parameter set and transmitted as mentioned in Table 12 (bottom table), or may be implicitly indicated as mentioned below.
  • some of signaling information for SRS transmission of type 2 may be included in a parameter set as shown in Table 12, but otherwise, for DM-RS of the type 2 SRS transmitting UE, It can be determined using the information included in the DCI.
  • the SRS of the second UE UE3 which is multiplexed and transmitted to the resource region through which the DM-RS of the specific first UE UE1 is transmitted (that is, the type 2 of UE3).
  • the SRS of the second UE UE3 which is multiplexed and transmitted to the resource region through which the DM-RS of the specific first UE UE1 is transmitted (that is, the type 2 of UE3).
  • information about 'CS value and OCC value for generating a SRS sequence for each UE of type 2' is transmitted through DCI for DM-RS of a UE (second UE; UE3) that transmits the SRS.
  • a UE second UE; UE3
  • the 3-bit information value defined for each UE in Table 6 is a value indicating the CS value and the OCC value for each antenna layer used for DM-RS transmission.
  • the value is used as information indicating a CS value and an OCC value for each antenna port used for SRS transmission by Type 2 of the second UE in the resource space transmitting the DM-RS of the first UE.
  • the second UE (UE3 of FIG. 3) considers itself only when transmitting DM-RS or only considers another UE transmitting DM-RS as MU-MIMO by sharing the same resource area with itself.
  • the second UE (UE3) is additionally added in the second method of the present invention.
  • the CS value and the OCC used when generating the DM-RS sequence are set to transmit 3 bit information as shown in Table 6 through the DCI.
  • scheduling constraints may exist from time to time.
  • scheduling constraints may exist from time to time.
  • only when necessary and possible e.g., when the parameter set value does not indicate that there is no type 2 SRS transmission
  • scheduling according to a semi-static predefined case Actively assigning CS values and / or OCCs allows some severe scheduling constraints to be resolved without increasing the overhead of DCI.
  • the CS value and the OCC value may be independently signaled.
  • the CS value may be signaled by being included in the parameter set shown in Table 12.
  • the OCC value may be included in a parameter set as shown in Table 12, and may be implicitly using information included in DCI used for DM-RS of a second UE (UE3 of FIG. 3) transmitting SRS according to Type 2 as follows. It may also be indicated.
  • information about 'OCC value for generating a SRS sequence for each UE of type 2' is transmitted through DCI for DM-RS of a second UE (UE3 of FIG. 3) transmitting SRS by the type 2. It is determined implicitly from the 3-bit information shown in Table 6. Specifically, in Table 6, the 3-bit information value indicated for each UE is a CS value and an OCC for each layer used for DM-RS transmission, of which the OCC value is the second value. Not only used as the OCC of the DM-RS sequence of the UE, but also of the second UE UE3 performing SRS transmission by Type 2 in the same resource region or some resource regions as the DM-RS resource of the first UE UE 1.
  • the OCC of the DM-RS sequence of the first UE and the OCC of the SRS sequence of the second UE transmitted using the same resource space are set to be orthogonal.
  • the OCC of the DM-RS sequence of the second UE to be transmitted may be scheduled to be orthogonal already.
  • the CS and the OCC are independently signaled for SRS transmission of type 2, and as described above, the CS value is 3 bits or 4 bits, and higher layer signaling (RRC) is performed. Etc.), a predetermined value is included in the parameter set, which is dynamically indicated by a specific field (SRS request field) in the DCI.
  • the OCC may be transmitted by being included in a parameter set, such as CS, as mentioned in 1 bit, or may be implicitly indicated through information included in DCI for DM-RS of a corresponding second UE transmitting SRS. .
  • any one of the manner in which the information on the 'OCC value for generating the SRS sequence for each UE of type 2' is included in the parameter set, or inherently indicated through the information included in the DCI for the DM-RS of the UE may be determined inherently in the system, but one of two signaling methods may be used depending on the system situation.
  • a signaling method implicitly indicated through the DCI information of the corresponding UE may be used, but the PDCCH for the corresponding UE does not exist at all or is downlinked. If DCI information of the corresponding UE is not available, such as only if there is a PDCCH for downlink of the corresponding UE such as link allocation, a scheme included in a parameter set for SRS transmission of type 2 may be used as shown in Table 12. .
  • the existing DM-RS and SRS are divided into orthogonal sequences such as OCC, SRS can be distinguished from each other by the CS value because the same RB and OCC are used.
  • OCC orthogonal sequences
  • information that is not included in the parameter set shown in Table 12 among the information required for the type 2 SRS transmission is the "Type 2 SRS transmission sub-frame for each UE" information.
  • the 'type 2 UE-specific SRS transmission subframe' information may be directly transmitted through higher layer signaling (RRC, etc.) similarly to the case of type 0 or 1, but may be determined inherently.
  • RRC higher layer signaling
  • DCI including information for DM-RS for a UE transmitting SRS in Type 2 (UE3 of FIG. 2) is delivered. If a value of an SRS request field, which is a field value indicating a parameter set included in DCI in Tables 7 to 10, does not indicate 'no triggering' of Type 2 SRS among specific subframes, Only the subframe may be determined as a “type 2 UE-specific SRS transmission subframe for UE3”.
  • information not included in the parameter set shown in Table 12 is 'cell-specific full SRS transmission subframe' information, 'cell-specific full SRS transmission RB' information, and the like. However, this may be determined in the same manner as the conventional type 0 or type 1.
  • the OCC value has a different value from the CS and / or OCC of the DM-RS sequence of the first UE, but among the parameters for SRS transmission of the second UE, 'UE SRS transmission RB' and 'UE SRS transmission antenna
  • At least one of 'number of ports', 'CS value and / or OCC value for generating an SRS sequence for each UE' may be determined as a parameter set indicated by information included in DCI for SRS transmission of the second UE.
  • 'CS value and OCC value for generating a SRS sequence for each UE' among the information may be included in the parameter set.
  • 3-bit signaling transmitted through DCI for DM-RS transmission of the second UE The information can be used to make the decision.
  • 'CS value for generating an SRS sequence for each UE' and 'OCC value for generating an SRS sequence for each UE' are separately signaled from the information, and 'OCC value for generating an SRS sequence for each UE' is included in the parameter set. It may be determined from the information transmitted in the DCI for the DM-RS transmission of the second UE.
  • the difference between the first scheme and the second scheme described above is that in the first scheme, the remaining orthogonality of the DM-RS in one of two slots in which the DM-RS of the first UE (UE1) is transmitted in one subframe.
  • a resource that is, a non-precoding DM-RS resource (in another slot, another UE other than the second UE using the remaining orthogonal resources of the DM-RS).
  • SRS transmission may be performed).
  • a second specificity is performed using the remaining orthogonal resources of the DM-RS for both slots in which the DM-RS of the first UE (UE1) is transmitted in one subframe.
  • the SRS of the UE (UE3) is transmitted. That is, in the second scheme, the SRS for one specific UE is transmitted over two times (ie, two slots) in one subframe.
  • the advantage of the second scheme over the first scheme is that when the SRS of the second UE is transmitted using the remaining orthogonal resources of the DM-RS of the first UE, the transmission bandwidth (BW) of the DM-RS and the transmission bandwidth of the SRS.
  • BW transmission bandwidth
  • the advantage that BW does not have to be the same allows more flexible resource allocation.
  • the CS value used when generating the DM-RS sequence for transmitting the DM-RS regardless of the CS value used when generating the DM-RS sequence for transmitting the DM-RS, the CS value used when generating the SRS sequence, if the OCC is different from each other orthogonality is maintained, more flexible scheduling is possible. .
  • the second scheme uses twice as much SRS resources as the first scheme (since the SRS for one specific UE must be transmitted twice in one subframe), and the hopping for DM-RS SGH (sequence hopping and / or sequence group hopping), which is a hopping, has to be disabled.
  • DM-RS SGH sequence hopping and / or sequence group hopping
  • first scheme and the second scheme only one of the first scheme and the second scheme may be used, and either one of the first scheme and the second scheme may be selectively used according to the system situation.
  • FIG. 4 illustrates a flow of an SRS transmission signaling method according to an embodiment of the present invention, and describes a process performed by an eNodeB.
  • the eNodeB may estimate the channel state of the second UE from the SRS of the second UE.
  • the parameter set may be configured as shown in Tables 7 to 10, and the indication information for indicating the parameter set may be 1 bit or 2 bits.
  • some of the plurality of parameters are not included in the parameter set, but may be determined using information included in DCI for DM-RS of the second UE, and for this purpose, a plurality of parameters used for the SRS transmission.
  • the indication information for the DM-RS may be determined and generated, and the indication information may be included in the DCI and transmitted. This may be added to step S420 of including the indication information in the DCI and being transmitted.
  • the plurality of parameters are set for the second UE. It may include 'SRS transmission RB', 'SRS allocation slots', 'number of SRS transmission antenna ports', 'CS value and / or OCC value for generating an SRS sequence', and the like.
  • the parameter not included in the parameter set and determined using DCI inclusion information used for the DM-RS of the second UE may be a 'CS value and / or OCC value for generating an SRS sequence'.
  • "CS value for generating an SRS sequence” or "CS value and OCC value for generating an SRS sequence” may be defined as shown in Table 6 as 3-bit information.
  • the plurality of parameters may indicate the second UE. It may include information on 'SRS transmission RB', 'number of SRS transmission antenna ports', 'CS value and OCC value for generating an SRS sequence', and the like.
  • the parameter which is not included in the parameter set and is determined using DCI inclusion information used for the DM-RS of the second UE may be a 'CS value and an OCC value for generating an SRS sequence'.
  • the 'CS value and the OCC value for generating the SRS sequence' may be defined as three bits of information as shown in Table 6, or the 'CS value for generating the SRS sequence' of 3-4 bits and '1 bit' OCC value for generating an SRS sequence.
  • the CS value is included in the parameter set in step S430, and only the OCC value is the second. It may be determined using the information included in the DCI for the DM-RS of the UE.
  • FIG. 5 is an internal configuration diagram of an eNodeB for performing SRS transmission signaling as shown in FIG. 4.
  • the eNodeB 500 may include some or more of a plurality of parameters used for SRS transmission of the second UE to indicate SRS transmission of the second UE in a resource region including all or part of a DM-RS transmission resource region of the first UE.
  • a type 2 parameter set manager 510 which generates one or more parameter set information (specifically, information indicated by parameters in each parameter set) and transmits the generated one or more parameter set information to the UE;
  • a type 2 DCI management unit 520 for transmitting the indication information capable of determining one of the parameter sets to the second UE and transmitting all or part of the DM-RS transmission resource region of the first UE from the second UE;
  • a type 2 SRS receiver 530 for receiving the SRS of the second UE transmitted in the resource region, and a channel estimator 540 for estimating the channel state of the second UE from the SRS of the second UE.
  • some of the plurality of parameters are not included in the parameter set, and the DM-RS sequence of the second UE is not included in the parameter set. It is the same as the above description that it can be determined from the indication information used for generation, and the detailed description is omitted to avoid duplication.
  • FIG. 6 illustrates a type 2 SRS transmission procedure according to the present invention, which is performed at a specific UE.
  • the second UE may have the same resource region or some resource region as the DM-RS transmission resource region of the first UE (or additionally, the same resource region or some resource as the entire resource region for the first UE and one or more other UEs other than the first UE).
  • One or more parameter set information (specifically, information indicated by parameters in each parameter set) configured to partially or entirely include a plurality of parameters used for SRS transmission of a second UE from an eNodeB to perform SRS transmission in an area).
  • some of the plurality of parameters used for SRS transmission of the second UE is not included in the parameter set, and determining from the information included in the DCI for the DM-RS of the second UE (S630) It may further comprise.
  • the plurality of parameters may correspond to the second UE. It may include 'SRS transmission RB', 'SRS allocation slot', 'SRS transmission antenna port number', 'CS value and / or OCC value for generating the SRS sequence' information for.
  • the parameter not included in the parameter set and determined using information included in the DCI for the DM-RS of the second UE is a CS value and / or an OCC value for generating an SRS sequence.
  • "CS value for generating an SRS sequence” or "CS value and OCC value for generating an SRS sequence” may be defined as shown in Table 6 as 3-bit information.
  • the plurality of parameters may indicate the second UE. It may include information on 'SRS transmission RB', 'number of SRS transmission antenna ports', 'CS value and OCC value for generating an SRS sequence', and the like.
  • a parameter that is not included in the parameter set and is determined by using information included in DCI for DM-RS of a second UE is 'CS value and OCC value for generating an SRS sequence'. Can be.
  • the 'CS value and the OCC value for generating the SRS sequence' may be defined as three bits of information as shown in Table 6, or the 'CS value for generating the SRS sequence' of 3-4 bits and '1 bit' OCC value for generating an SRS sequence.
  • the CS value is included in the parameter set, and only the OCC value is the second. It may be determined using the information included in the DCI for the DM-RS of the UE.
  • FIG. 7 illustrates an internal configuration of a type 2 SRS transmitting UE according to an embodiment of the present invention.
  • the UE 700 for type 2 SRS transmission is a terminal for transmitting SRS in a resource space or some resource space in which one or more other UEs transmit a DM-RS, and the one or more other UEs in the DM-RS.
  • a parameter set information receiver 700 for receiving, from the eNodeB, one or more parameter set information including some or all of a plurality of parameters required for transmitting an SRS in a resource space for transmitting the SRS, and indicating a specific parameter set among the parameter sets; SRS for determining the plurality of parameters using the indication information receiver 720 for receiving indication information from the eNodeB, a specific parameter set determined from the indication information, and information included in DCI for DM-RS transmission of the UE.
  • Other UE of the SRS may be configured to include a processor 740 that transmits to the eNodeB after allocating the same resource space or a part of the resource space and the resource space for transmitting a DM-RS.
  • the parameter set information indicates one or more of a plurality of parameters for transmitting SRS in a resource space in which one or more other UEs transmits a DM-RS as a set, as shown in Tables 7 to 10, respectively.
  • the parameter set is matched with one or two bits of indication information, and the indication information may be included in a specific field (SRS Request Filed) of the DCI.
  • the parameter set information receiver 700 may receive information indicated by parameters in each parameter set through higher layer signaling such as RRC.
  • the types of parameters that can be inherently determined from the parameters included in the parameter set and the information included in the DCI for the DM-RS of the UE transmitting the SRS according to the embodiment of the present invention are as described above. It may be determined differently by the second method.
  • the plurality of parameters may include 'SRS transmission RB', 'SRS allocation slot', 'SRS transmission antenna port number', 'CS value and / or OCC value for SRS sequence generation' information, etc. for the specific UE.
  • a parameter that is not included in the parameter set and is determined by using information included in DCI for DM-RS of the specific UE may be 'CS value and / or OCC value for generating an SRS sequence'.
  • "CS value for generating an SRS sequence” or "CS value and OCC value for generating an SRS sequence” may be defined as shown in Table 6 as 3-bit information.
  • the plurality of parameters may indicate a second UE. It may include information on 'SRS transmission RB', 'number of SRS transmission antenna ports', 'CS value and OCC value for generating an SRS sequence', and the like.
  • the parameter not included in the parameter set and determined using DCI inclusion information used for the DM-RS of the specific UE may be a 'CS value and an OCC value for generating an SRS sequence'.
  • the 'CS value and the OCC value for generating the SRS sequence' may be defined as three bits of information as shown in Table 6, or the 'CS value for generating the SRS sequence' of 3-4 bits and '1 bit' OCC value for generating an SRS sequence.
  • the CS value is included in the parameter set and the SRS transmission parameter determiner 730 is included. May determine only the OCC value using the information included in the DCI for the DM-RS of the second UE.
  • the SRS processing unit 740 of the UE generates an SRS sequence to be transmitted in Type 2 by using the CS and OCC determined by the first scheme or the second scheme, Using the remaining parameters (SRS transmission subframe, RB, slot information, etc.) to map the SRS sequence to the corresponding resource space (that is, resource space in which the DM-RS of the other one or more UEs are transmitted), and then generated as an OFDM signal And to perform this function to transmit this to the eNodeB through the corresponding antenna, in detail, in addition to the SRS according to the present invention may further include a configuration for the transmission of other data or information, specifically in the base station Scrambler, modulation mapper, layer mapper, precoder, OFDM signal generator (OFDM sign) al generator) and the like, but this configuration is not necessary in the present embodiment.
  • OFDM sign OFDM sign
  • other reference signals and control signals may be allocated to resource elements first, and other data or signals may be additionally allocated to the remaining resource elements in the time-frequency resource space.
  • the OFDM signal processor After multiplexing with the base station transmission frame at a predetermined frame timing, the OFDM signal processor generates a complex time domain OFDM signal for the corresponding SRS, and then transmits the complex time domain OFDM signal through the corresponding antenna port.
  • the SRS of the second UE can be transmitted by using orthogonal resources remaining in the resource space for DM-RS transmission of the first UE, that is, non-precoding DM-RS, in an environment where multiple UEs are used.
  • additional resources for SRS transmission can be secured. Due to this effect, it may be able to cope with the case where the SRS needs to be transmitted separately for more UEs considered in an environment such as CoMP or MU-MIMO.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un appareil pour la transmission de signaux de référence de sondage (SRS) dans un système de communication sans fil, ainsi qu'un procédé et un appareil pour indiquer la transmission d'un SRS. Une station de base (eNodeB), qui reçoit des signaux de référence de liaison montante en provenance d'une pluralité d'équipements utilisateur (UE) génère et transmet à l'UE des informations relatives à au moins un ensemble de paramètres (et chaque élément d'information indiqué par les paramètres au sein de chacun des ensembles de paramètres) qui comprend tout ou partie d'une pluralité de paramètres servant à la transmission de SRS pour un second UE afin d'indiquer la transmission de SRS pour le second UE dans un domaine de ressources comportant tout ou partie d'un domaine de ressources de transmission de signal de référence de démodulation (DM-RS) du premier UE. Ledit eNodeB transmet au second UE, pour la transmission de SRS s'y rapportant, des DCI incluant des informations d'indication qui permettent la sélection d'un ensemble de paramètres parmi les ensembles de paramètres. Le second UE, qui a reçu les DCI, attribue, sur la base de la pluralité de paramètres précédemment sélectionnés, un SRS dans un domaine de ressources comportant tout ou partie d'un domaine de ressources de transmission de DM-RS du premier UE, et le transmet à l'eNodeB. Le SRS pour le second UE peut être transmis au moyen d'une ressource orthogonale restante dans l'espace de ressources pour la transmission de DM-RS qui correspond au premier UE, autrement dit d'une ressource de DM-RS non précodée, et la présente invention a par conséquent l'avantage de garantir des ressources supplémentaires pour les transmissions de SRS dans un environnement comprenant une pluralité d'UE en cours d'utilisation.
PCT/KR2012/006073 2011-08-12 2012-07-30 Procédé et appareil pour la transmission d'un signal de référence de sondage, et procédé et appareil pour indiquer la transmission d'un signal de référence de sondage s'y rapportant Ceased WO2013024983A2 (fr)

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KR10-2011-0080915 2011-08-12

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CN108260217A (zh) * 2018-03-05 2018-07-06 中兴通讯股份有限公司 一种信息传输的方法、装置和通信节点
CN111972021A (zh) * 2018-04-03 2020-11-20 华为技术有限公司 用于上行传输的信道测量
JPWO2022014272A1 (fr) * 2020-07-15 2022-01-20

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WO2016186425A1 (fr) * 2015-05-18 2016-11-24 엘지전자 주식회사 Procédé et appareil de conception d'un signal de référence de liaison montante selon un motif répétitif tenant compte de la couverture de cellules dans un système de communications sans fil
CN107370563B (zh) * 2016-05-13 2021-11-02 中兴通讯股份有限公司 信息传输方法及装置
WO2024237412A1 (fr) * 2023-05-12 2024-11-21 삼성전자 주식회사 Procédé et dispositif d'émission et de réception de signal de référence de sondage dans un système de communication

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EP2482591B1 (fr) * 2009-09-21 2018-08-15 LG Electronics Inc. Procédé d'émission d'un signal de référence de sondage dans un système de communication sans fil, et appareil à cet effet
KR101651685B1 (ko) * 2009-11-08 2016-08-29 엘지전자 주식회사 무선 통신 시스템에서 참조 신호 전송 방법 및 장치
KR101781854B1 (ko) * 2010-02-04 2017-09-26 엘지전자 주식회사 사운딩 참조 신호를 전송하는 방법 및 장치

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CN108111271B (zh) * 2017-06-16 2023-09-19 中兴通讯股份有限公司 参考信号的信令指示、参考信号的发送方法及装置
CN108260217A (zh) * 2018-03-05 2018-07-06 中兴通讯股份有限公司 一种信息传输的方法、装置和通信节点
CN108260217B (zh) * 2018-03-05 2024-06-04 中兴通讯股份有限公司 一种信息传输的方法、装置和通信节点
CN111972021A (zh) * 2018-04-03 2020-11-20 华为技术有限公司 用于上行传输的信道测量
CN111972021B (zh) * 2018-04-03 2023-04-04 华为技术有限公司 用于上行传输的信道测量
JPWO2022014272A1 (fr) * 2020-07-15 2022-01-20
WO2022014272A1 (fr) * 2020-07-15 2022-01-20 パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ Terminal, station de base et procédé de communication
CN115812335A (zh) * 2020-07-15 2023-03-17 松下电器（美国）知识产权公司 终端、基站及通信方法

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